Ridiman, B. (1973). What is a shadow?: A second book of simple science fun: experiences with gravity, shadows, mirrors, and electricity. Parents' Magazine Press.
Chicago Style (17th ed.) CitationRidiman, Bob. What Is a Shadow?: A Second Book of Simple Science Fun: Experiences with Gravity, Shadows, Mirrors, and Electricity. New York: Parents' Magazine Press, 1973.
MLA (9th ed.) CitationRidiman, Bob. What Is a Shadow?: A Second Book of Simple Science Fun: Experiences with Gravity, Shadows, Mirrors, and Electricity. Parents' Magazine Press, 1973.
Warning: These citations may not always be 100% accurate.